diff --git a/Tests/Complex/Executable/CMakeLists.txt b/Tests/Complex/Executable/CMakeLists.txt
index e36dc2656a..11332d1dcd 100644
--- a/Tests/Complex/Executable/CMakeLists.txt
+++ b/Tests/Complex/Executable/CMakeLists.txt
@@ -4,6 +4,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 1.3)
 #
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTEST_CXX_FLAGS")
 SET(CMAKE_C_FLAGS "${CMAKE_C} -DTEST_C_FLAGS")
+SET(CMAKE_C_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_C_FLAGS}")
 
 # Link to CMake lib
 LINK_DIRECTORIES(${Complex_BINARY_DIR}/../../Source)
diff --git a/Tests/ComplexOneConfig/Executable/CMakeLists.txt b/Tests/ComplexOneConfig/Executable/CMakeLists.txt
index e36dc2656a..11332d1dcd 100644
--- a/Tests/ComplexOneConfig/Executable/CMakeLists.txt
+++ b/Tests/ComplexOneConfig/Executable/CMakeLists.txt
@@ -4,6 +4,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 1.3)
 #
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTEST_CXX_FLAGS")
 SET(CMAKE_C_FLAGS "${CMAKE_C} -DTEST_C_FLAGS")
+SET(CMAKE_C_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_C_FLAGS}")
 
 # Link to CMake lib
 LINK_DIRECTORIES(${Complex_BINARY_DIR}/../../Source)
diff --git a/Tests/ComplexRelativePaths/Executable/CMakeLists.txt b/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
index e36dc2656a..11332d1dcd 100644
--- a/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
+++ b/Tests/ComplexRelativePaths/Executable/CMakeLists.txt
@@ -4,6 +4,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 1.3)
 #
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTEST_CXX_FLAGS")
 SET(CMAKE_C_FLAGS "${CMAKE_C} -DTEST_C_FLAGS")
+SET(CMAKE_C_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_C_FLAGS}")
 
 # Link to CMake lib
 LINK_DIRECTORIES(${Complex_BINARY_DIR}/../../Source)